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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Comp Biochem Physiol Part D Genomics Proteomics. 2011 Mar 5;6(2):163–170. doi: 10.1016/j.cbd.2011.02.003

Fig. 3.

Fig. 3

Normal weight gain of ground squirrels fed 15N. Three animals were fed protein-free rat chow supplemented with Spirulina from weaning (day 0). Animal 2055 (open squares) received Spirulina containing natural abundance nitrogen isotopes, whereas the Spirulina for animals 2053 and 2054 (filled circles and diamonds, respectively) contained at least 99% 15N.